All your extensions are stored here. Obviously change your name to your user account name and also AppData is a hidden folder so you will need
to have your setting to allow showing of hidden directories.

Just copy the folder with the toolbar extension and transfer it to your new computer. You can also zip that folder put it online and share it those who are still looking for this extension that has been removed from the chrome store.

I loved that extension too, and also asked the question a while back. I had to uninstall/reinstall Chrome and I can't find it anywhere. I can't find it using Acidbaby's suggestion either...but that may be me.